I will readily admit I am mechanically stunted. Never learned to work on a car, never learned to build anything. Just awful.

So a few years ago I bought a GMC Envoy Denali. I has the rear air shocks. For the first few years I was pretty happy with my car, but the past two years have been awful. I noticed that the ride in back began to get lower and lower. If I parked it, it would drop completely, and then raise back up when I started it. not knowing jack nor shit about cars, or even what an "air shock" was, I figured it was kinda normal...until it started raising more and more slowly...and finally stopped raising at all.
About 18 months ago, I finally replaced the airbags in it, and it rode back to normal, and I was back to being happy. But over the summer it started dropping again and not raising. I took it to Firestone, and they said the bags had pin holes in them. So I took it back to Christian Brothers, where I had gotten the new bags, to have them check them, since they were only a year old. they said the bags were fine, and the compressor (s?) had gone bad. Either way, it was far more expensive to fix than I could afford. Of course, a couple of weeks ago, a student of mine brought up a point I had (stupidly) never thought of...

Why not just replace the air shocks with standard shocks?

My question is, is this possible? I just looked online and found "conversion kits" that seem quite a bit cheaper, but I don't know where I'd take it to to have it done. Anyone have experience with this? Advice? Funny quips making fun of me for having a funny haircut?